Source code for enamlnative.ios.uikit_switch

"""
Copyright (c) 2017, CodeLV.

Distributed under the terms of the MIT License.

The full license is in the file LICENSE, distributed with this software.

Created on Aug 25, 2017

@author: jrm
"""

from atom.api import Typed, Bool
from enamlnative.widgets.switch import ProxySwitch

from .bridge import ObjcMethod, ObjcProperty, ObjcCallback
from .uikit_control import UIControl, UiKitControl


[docs]class UISwitch(UIControl):
    """
    """
    #: Properties
    on = ObjcProperty('bool')
    onTintColor = ObjcProperty('UIColor')
    tintColor = ObjcProperty('UIColor')
    thumbTintColor = ObjcProperty('UIColor')
    onImage = ObjcProperty('UIImage')
    offImage = ObjcProperty('UIImage')

    #: Methods
    #: Works but then doesn't let you change it
    setOn = ObjcMethod('bool', dict(animated='bool'))

    #: Callbacks
    onValueChanged = ObjcCallback('bool')


[docs]class UiKitSwitch(UiKitControl, ProxySwitch):
    """ An UiKit implementation of an Enaml ProxyToolkitObject.

    """

    #: A reference to the toolkit widget created by the proxy.
    widget = Typed(UISwitch)

    # -------------------------------------------------------------------------
    # Initialization API
    # -------------------------------------------------------------------------
[docs]    def create_widget(self):
        """ Create the toolkit widget for the proxy object.
        """
        self.widget = UISwitch()

[docs]    def init_widget(self):
        """ Bind the on property to the checked state """
        super(UiKitSwitch, self).init_widget()

        d = self.declaration
        if d.checked:
            self.set_checked(d.checked)

        #: Watch the on property for change
        #: So apparently UISwitch is not KVO compliant...
        # self.widget.addObserver(
        #     self.get_app().view_controller,
        #     forKeyPath="on",
        #     options=UISwitch.NSKeyValueObservingOptionNew|UISwitch.NSKeyValueObservingOptionOld,
        #     context=self.widget
        #)

        #: A really ugly way to add the target
        #: would be nice if we could just pass the block pointer here :)
        self.get_app().bridge.addTarget(
            self.widget,
            forControlEvents=UISwitch.UIControlEventValueChanged,
            andCallback=self.widget.getId(),
            usingMethod="onValueChanged",
            withValues=["on"]#,"selected"]
        )

        self.widget.onValueChanged.connect(self.on_checked_changed)

[docs]    def on_checked_changed(self, on):
        """ See https://stackoverflow.com/questions/19628310/ """
        #: Since iOS decides to call this like 100 times for each defer it
        d = self.declaration
        with self.widget.setOn.suppressed():
            d.checked = on

    # -------------------------------------------------------------------------
    # ProxySwitch API
    # -------------------------------------------------------------------------
[docs]    def set_checked(self, checked):
        self.widget.setOn(checked, animated=True)

[docs]    def set_show_text(self, show):
        pass  #: Has no text

[docs]    def set_split_track(self, split):
        pass

[docs]    def set_text_off(self, text):
        pass

[docs]    def set_text_on(self, text):
        pass